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The report released Thursday by the federal Centers for Disease Control and Prevention, found 11.7 percent of deaths among Native Americans and Alaska Natives between 2001 and 2005 were alcohol-related, compared with 3.3 percent for the U.S. as a whole.

Dwayne Jarman, a CDC epidemiologist who works for the Indian Health Service and is one of the study's authors, said it is the first national survey that measures Native American deaths due to alcohol. It should be a "call to action" for federal, state, local and tribal governments, he said.

The researchers obtained their statistics by analyzing death certificates over the four-year period.

The two leading causes of alcohol-related deaths among Indians were traffic accidents and alcoholic liver disease, each of which cause more than a quarter of the 1,514 alcohol-related deaths over the four-year period.

There may be many more alcohol-related deaths than the study shows, in part because the CDC analysis did not count deaths related to some diseases for which alcohol is believed to be an important risk factor, such as tuberculosis, pneumonia and colon cancer.

The greatest number of tribal alcohol-related deaths — about a third of the total — occurred in the Northern Plains, where reservations are remote and often destitute, the study said. The lowest number of deaths were in Alaska.

Jarman said the study did not look at why there may be more deaths in the Plains but said it is consistent with previous studies.

"It may be a function of social perceptions of alcohol in that particular region," he said. The report did not break down the numbers by tribe.

66 percent were younger than 50
The study said more than 68 percent of the Indians whose deaths were attributed to alcohol were men, and 66 percent were people younger than 50 years old. Seven percent were less than 20 years old.

Donovan Antelope, a spokesman for the Northern Arapaho Tribe, said alcoholism has been a problem for more than a century with many Indian populations.

"It has had a very negative impact on our day-to day life," he said, adding that the tribe has started promoting alcohol-free events.

In general, American Indians suffer much higher death rates of most leading causes than the rest of the country. Besides alcoholism, drug use, diabetes, cardiovascular disease and suicide also are high.